Double sash lock



R. G. .READER 2,167,960

DOUBLE SASH LOCK Filed June 26, 1937 INVENTOR IPO/Da 6." A360042#Patented Aug. 1, 1939 UNITED STATES miic-1W OFFICE DOUBLE SASH LOCKRoman G. Reader, Chicago, Ill.

v Application June 26, 1937, Serial No. 150,567

2 Claims.

This invention relates in general to a locking mechanism and has moreparticular reference to a double sash lock for windows.

A principal object of the invention is the provision of a double sashlock for` windows, which is adapted to hold the lower window sash inclosed position and at the same time prevent the upper window sash frombeing moved downwardly.

Another important object of the invention is the provision of a doublesash lock for windows, which is fastened to the window stop and cannotbe tampered with from the outside.

A still further important object of thel invention is the provision of adouble sash lock for windows, which is economical to manufacture and iseasily adapted for use cn various sizes of double sash windows.

Numerous other objects and advantages of the invention will be apparentas it is better understood from the following description, which, takenin connection with the accompanying drawing, discloses a preferredembodiment thereof.

In the drawing,

Figure 1 is a perspective view of a portion of a doublesash windowshowing the locking mechanism in closed position; and` Fig. 2 is asectional View of the double sash window, similar to Fig. 1, with partsof the locking mechanism broken away to illustrate the means of holdingthe lower window sash in position.

Referring more particularly to the drawing, reference numeral IIindicates in general a hinge member. One portion I2 of the hinge memberII is fastened to a window stop I3 by screws I4, or the like. Theportion I2 is usually tted or mo-rtised in the window stop I3 in orderto prevent any vertical movement thereof.

A second member I5 is pivotally mounted on the member I2 by means of arivet I6. The member I5 has a flattened portion I'I which is bent atright angles to the member I5 and is adapted to rest upon the uppersurface of the lower window sash I8. A second flattened Dortion I9 isformed at right angles to the member I5 and is adapted to rest againstthe upper window sash 2|. A small rivet member 22 is fastened in themember I'I to prevent the member I5 from being easily rotated about thepin I6 and to provide a friction means thereof.

A catch member 23 is fastened to the upper window sash 2l by means ofscrews 24, or the like, and is so placed as to be adjacent the uppersurface of the member I9 when the window sashes I8' and 2 I 'are inclosed position. The catch member 23 has its lower portion bent awayfrom the window sash I9 so that a small space is created therebetween,this space being large enough to 5, allow the member I9 to fit closelywithin when the catch 23 is moved into its locking position. Y

A safety catch 25-is pivotally mounted at 26 to the member I5 andextends longitudinally thereof from right to left (Fig. 2) so as to tover 10 the pivot pin I6 and rest against the member I2. The free end ofthe member 25 fits into a small groove 21 in the member I2 so that itdoes not create any obstruction which will allow an individual to insertany means, such as a small bent .5 wire or the like, and cause themember 25 topivot about its pivot point 26. To insure a still furtherlocking of the members I5 and I2 by means of the member 25, a smallindentation 28 is provided in the member 25 which will cause aprotuberance to be formed on the other side which coincides with asimilar indentation formed in the member I2 (not shown).

A description of the method and operation of the device is as follows:

When the window sash I8 is in its closed position, the member l5 ispivoted about its pivot point I6 until it assumes the position shown inFig. 1. When the member I5 is in this position, the member I'I will restupon the upper surface of the window sash I8 and the rivet' 22 will beembedded in the surface thereof. The window sash I8 is therefore inlocked position and cannot be moved. The latch member 25 is then pivotedabout its pivot point 26 until it rests in the groove 21. When themember 25 is in this position, the member I5 cannot be pvoted about itspivot point I6. The upper sash member I2 having the catch 23 fastenedthereon may be lowered a slight distance, but further movement isprevented, because the lower portion of the catch 23 will come incontact with the member I9 and will engage the same.

While only one locking mechanism I I is shown in the drawing, a similarmechanism may be fastened to the other window stop and a double lockingof the window will be had. Thus it will be apparent that by using thedevice, as described above, a positive locking of the window sashes I8and ZI will be had.

It is thought that the invention and many of its attendant advantageswill be understood from the foregoing description, and it will beapparent that various changes may be made in the form, construction andarrangement of the parts without departing from the spirit and scope ofthe invention or sacrificing all of its material advantages, the formhereinbefore described being merely a preferred embodimentv thereof.

I claim:

1. A locking mechanism for windows, comprising a hinge member fastenedto the window stop, a stop member pivotally mounted on said hingemember, said stop member having a flattened portion bent at a rightangle theretoand adapted to rest upon the upper surface of the lowerwindow sash to prevent upward movement thereof, a second flattenedportion bent at a right angle to said stop member and said rst iiattenedportion and adapted to rest against the upper Window sash, a lockingmember mounted on said stop member to prevent laterial movement of saidstop member, and a catch member mounted on the upper Window sashadjacent said stop member adapted to engage said second flattenedportion to limit downward movement of said upper window sash.

2. A double sash lock for windows, comprising a hinge member mortised inthe Window stop, a movable stop member pivotally mounted on said hingemember, said movable stop member having a flattened portion bent at aright angle thereto and adapted to rest upon the upper surface of thelower window sash to prevent upward movement thereof, a second flattenedportion bent at a right angle to said movable stop member and said rstflattened portion and adapted to rest against the upper Window sash, alatch member pivotally mounted on said movable stop member and movableinto engagement with said hinge member to prevent lateral movement ofsaid movable stop member, and a catch member mounted on the upper windowsash adjacent said movable stop member adapted to engage said secondiiattened portion to limit downward movement of said upper Window sash.

